Datasheet

LTC1272
4
1272fc
For more information www.linear.com/1272
DYNAMIC ACCURACY
(Note 4) f
SAMPLE
= 250kHz (LTC1272-3), 111kHz (LTC1272-8)
SYMBOL PARAMETER CONDITIONS
LTC1272-XA/C
UNITSMIN TYP MAX
S/(N+D) Signal-to-Noise Plus Distortion Ratio 10kHz Input Signal 72 dB
THD Total Harmonic Distortion (Up to 5th Harmonic) 10kHz Input Signal –82 dB
Peak Harmonic or Spurious Noise 10kHz Input Signal –82 dB
ANALOG INPUT
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
SYMBOL PARAMETER CONDITIONS
LTC1272-XA/B/C
UNITSMIN TYP MAX
V
IN
Input Voltage Range 4.75V ≤ V
DD
≤ 5.25V
l
0 5 V
I
IN
Input Current
l
3.5 mA
C
IN
Input Capacitance 50 pF
t
ACQ
Sample-and-Hold Acquisition Time
l
0.45 1 µs
TIMING CHARACTERISTICS
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 8)
SYMBOL PARAMETER CONDITIONS
LTC1272-XA/C
UNITSMIN TYP MAX
t
1
CS to RD Setup Time
l
0 ns
t
2
RD to BUSY Delay C
L
= 50pF
COM Grade
l
80 190
230
ns
ns
t
3
Data Access Time After RD↓ C
L
= 20pF
COM Grade
l
50 90
110
ns
ns
C
L
= 100pF
COM Grade
l
70 125
150
ns
ns
t
4
RD Pulse Width
COM Grade
l
t
3
t
3
ns
ns
t
5
CS to RD Hold Time
l
0 ns
t
6
Data Setup Time After BUSY
COM Grade
l
40 70
90
ns
ns
t
7
Bus Relinquish Time
COM Grade
l
20
20
30 75
85
ns
ns
t
8
HBEN to RD Setup Time
l
0 ns
t
9
HBEN to RD Hold Time
l
0 ns
t
10
Delay Between RD Operations
l
200 ns
t
11
Delay Between Conversions 1 µs
t
12
Aperture Delay of Sample and Hold Jitter <50ps 25 ns
t
13
CLK to BUSY Delay
COM Grade
l
80 170
220
ns
ns
t
CONV
Conversion Time
l
12 13 CLK
CYCLES